Jersey County weather alerts
There are no active weather alerts for Jersey County, IL right now.
Since 2016 the National Weather Service has issued about 743 alerts that included Jersey County, roughly 74 a year. The most common is the severe thunderstorm warning (139 from 2016 to 2025). The last tornado warning was issued on April 27, 2026. 20 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Jersey County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Macoupin County, Greene County, Madison County, Calhoun County.
Jersey County alert history
Alert events that included Jersey County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 139 | 19 | July 11, 2026 |
| Flood Warning | 77 | 3 | June 16, 2026 |
| Severe Thunderstorm Watch | 70 | 4 | June 11, 2026 |
| Dense Fog Advisory | 67 | 3 | May 9, 2026 |
| Winter Weather Advisory | 62 | 1 | March 2, 2026 |
| Wind Advisory | 47 | 4 | June 17, 2026 |
| Flood Watch | 38 | 7 | August 6, 2026 |
| Heat Advisory | 35 | 7 | September 15, 2026 |
| Tornado Watch | 33 | 6 | June 17, 2026 |
| Freeze Warning | 27 | 2 | November 7, 2026 |
| Tornado Warning | 18 | 5 | April 27, 2026 |
| Flood Advisory | 17 | 0 | June 27, 2025 |
| Flash Flood Warning | 15 | 3 | June 8, 2026 |
| Cold Weather Advisory | 15 | 3 | January 26, 2026 |
| Frost Advisory | 15 | 2 | October 18, 2026 |
| Red Flag Warning | 12 | 1 | February 27, 2026 |
| Winter Storm Warning | 10 | 1 | January 24, 2026 |
| Freeze Watch | 9 | 0 | November 2, 2025 |
| Winter Storm Watch | 9 | 1 | January 24, 2026 |
| Extreme Heat Warning | 8 | 3 | September 3, 2026 |
| Extreme Heat Watch | 6 | 1 | July 26, 2026 |
| Extreme Cold Warning | 4 | 1 | January 26, 2026 |
| Fire Weather Watch | 3 | 0 | October 17, 2020 |
| High Wind Warning | 3 | 0 | March 5, 2025 |
| Extreme Cold Watch | 2 | 0 | December 22, 2022 |
| Ice Storm Warning | 1 | 0 | January 13, 2017 |
| High Wind Watch | 1 | 0 | March 14, 2019 |
Tornado history in Jersey County
20 tornadoes have been recorded in Jersey County since 1950, killing 1 people and injuring 3. That ranks 73 of 102 counties in Illinois. The most recent was on April 18, 2024 (rated unknown).
Strongest tornadoes in Jersey County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| March 8, 2009 | EF2 | Jersey County | 1 mi | 100 yd | 0 | 0 |
| May 1, 1983 | F2 | Jersey County | 0.5 mi | 77 yd | 0 | 1 |
| May 1, 1983 | F2 | Jersey County | 0.2 mi | 17 yd | 0 | 1 |
| September 24, 1961 | F1 | Jersey County | 0.1 mi | 10 yd | 1 | 0 |
| March 6, 1961 | F1 | Jersey County | 117.9 mi | 77 yd | 0 | 1 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 18, 2024 | ? | Jersey County | 0 mi | 10 yd | 0 | 0 |
| March 14, 2024 | EF0 | Jersey County | 2.8 mi | 200 yd | 0 | 0 |
| March 14, 2024 | EF0 | Jersey County | 3.9 mi | 75 yd | 0 | 0 |
| March 14, 2024 | EF0 | Jersey County | 8.7 mi | 100 yd | 0 | 0 |
| June 28, 2018 | EF0 | Jersey County | 1.4 mi | 50 yd | 0 | 0 |
About Jersey County
- Population: 21,150 (2024 estimate)
- State: Illinois
- NOAA Weather Radio SAME code: 017083 (how to use it)